Vector Form Intrinsic Finite-Element Analysis for Train and Bridge Dynamic Interaction

Duan, Yuanfeng; Wang, S. M.; Wang, R. Z.; Wang, C. Y.; Shih, Jou Yi; Yun, Chung Bang

doi:10.1061/(asce)be.1943-5592.0001171

Cited by 18 publications

(8 citation statements)

References 31 publications

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“…The unit vector, e n + 1 , in the convected coordinate of the element is updated as

e_{n + 1} = \frac{1}{l_{n + 1}} ((), x_{n + 1}^{a} - x_{n + 1}^{b}) .

As the predicted values of x n + 1 and β n + 1 are absolute displacements, rigid‐body motions need to be tilted out to obtain pure deformation. Virtual reverse motion is adopted herein to eliminate rigid body motion, and a reference node, such as a in Figure , is selected. Rigid‐body translation d , between

x_{n + 1}^{a}

and

x_{n}^{a}

, can then be tilted out as in Figure b.…”

Section: Application Of Vfife To Rthsmentioning

confidence: 99%

“…In this paper, a parallel RTHS platform is proposed based on the vector form intrinsic finite element (VFIFE) and the field programmable gate array (FPGA), which can effectively relieve the computational burden in RTHS with a numerical model containing many DOFs. The VFIFE is a method of structural analysis developed by Ting et al to handle nonlinear dynamic problems involving large deformations or rigid motions . Many studies on structural nonlinearity have been carried out using the VFIFE.…”

Section: Introductionmentioning

confidence: 99%

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Real-time hybrid simulation based on vector form intrinsic finite element and field programmable gate array

Duan

Tao

Zhang

et al. 2018

Struct Control Health Monit

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The numerical substructure of a real-time hybrid simulation (RTHS) has been considerably simplified through condensation methods to relieve the burden incurred by computation. However, this simplification severely limits the application of RTHS to structures whose numerical parts are complex and require a large number of degrees of freedom (DOFs) to model. Thus, in this study, a vector form intrinsic finite element (VFIFE) analysis is introduced to RTHS with numerical substructures containing a large number of DOFs. A field programmable gate array (FPGA) is also employed to speed-up the numerical simulation of the VFIFE through parallel computing in RTHS. The characteristics of this parallel RTHS platform using VFIFE and FPGA are discussed in detail in this paper. A simple RTHS was carried out to verify the feasibility of this new platform, followed by a complex virtual RTHS to show its powerful computational capability. KEYWORDS degree of freedom, field programmable gate array, parallel computing, real-time hybrid simulation, vector form intrinsic finite element

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“…The unit vector, e n + 1 , in the convected coordinate of the element is updated as

e_{n + 1} = \frac{1}{l_{n + 1}} ((), x_{n + 1}^{a} - x_{n + 1}^{b}) .

x_{n + 1}^{a}

and

x_{n}^{a}

, can then be tilted out as in Figure b.…”

Section: Application Of Vfife To Rthsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Real-time hybrid simulation based on vector form intrinsic finite element and field programmable gate array

Duan

Tao

Zhang

et al. 2018

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…The continuous development and update of new elements as well as algorithms allow for a wide application of VFIFE in many fields, such as civil engineering [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], maritime engineering [38][39][40][41][42][43][44][45], mechanical engineering [17] and biomechanics [46]. It is confirmed by these literatures that VFIFE has a great potential for the application to civil and infrastructure engineering.…”

Section: Introductionmentioning

confidence: 96%

openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

et al. 2021

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The vector form intrinsic finite (VFIFE) method is a new and promising structural analysis technique that has many advantages as compared with the conventional finite element method (FEM) in analyzing the complex behaviors of a structure. However, despite the popularization of its application in civil and infrastructure engineering, there is no available unified general analysis framework for it, which limits the applications and developments of VFIFE. This work develops and implements a platform (termed openVFIFE) based on a new proposed object-oriented framework to facilitate the development and application of the vector form intrinsic finite method as well as the efficient and accurate analyses of complex behaviors for civil structures. To validate the platform, a series of numerical examples are conducted. Furthermore, to extend the applications of VFIFE, the nonlinear dynamic and collapse processes of a transmission tower under earthquake load are studied using openVFIFE. The results of these numerical examples simulated by the developed truss or beam elements are consistent with theoretical solutions, previous research or conventional finite element models. The failure modes of the transmission tower under earthquake load simulated by the platform is consistent with those observed in real cases. In addition, the results of nonlinear dynamic analyses of the transmission tower show that the computational efficiency of the proposed platform is 6-10 times higher than that of the conventional finite element method. The results provide sufficient evidence to prove the accuracy and efficiency of the proposed platform in the static, dynamic and elastoplastic analyses of truss and frame structures, especially in the structure analysis characterized by strong geometry nonlinearity. It is noteworthy that in addition to the link and beam elements, further work is undergoing on implementing more elements, such as shell and solid elements. The openVFIFE also allows researchers who are interested in this topic to put their creative ideas into this platform and continuously improve the completeness and applicability of the VFIFE method.

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“…Rayleigh damping is assumed for the bridge [2]. In the literature, the dynamic behavior of structures subjected to four-axle two-bogie train with 10 unconstrained degrees of freedom is investigated by authors [3][4][5][6][7]. Other train models have been studied, such as those 2-axle 6 DOF by [8] , 4 DOF by [9] ; moving suspension mass model [10].…”

Section: Introductionmentioning

confidence: 99%

Hızlı Tren Geçişine Maruz Kalan Viyadüklerin Etkin Mod Şekilleri

Demirtaş¹,

Öztürk²

2021

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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The high-speed railways require more viaducts than conventional railways. The dynamic interaction effect between train and viaduct are important issue due to the risk of derailment, structural safety and deterioration of the passenger comfort. In this study, viaduct is modelled as a multi-bay frame. The multi-bay frame is modelled by finite element method. The train is idealized as a two-axle system with 4 degrees of freedom. The equations of motions of the coupled vehicle-structure system are determined via generalized Lagrange's equation. The Wilson-theta time integration method is employed to determine the dynamic response of the system. The effective mode shapes are investigated using 3D frequency-velocity-amplitude graphs. The resonant response has been determined at first and second modes of 1 and 2-bay frames.

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Vector Form Intrinsic Finite-Element Analysis for Train and Bridge Dynamic Interaction

Cited by 18 publications

References 31 publications

Real-time hybrid simulation based on vector form intrinsic finite element and field programmable gate array

Real-time hybrid simulation based on vector form intrinsic finite element and field programmable gate array

openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

Hızlı Tren Geçişine Maruz Kalan Viyadüklerin Etkin Mod Şekilleri

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